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user236182
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30
What is Cauchy Schwarz in 8th grade terms?
Nov 8, 2015
25
Prove that $\gcd(a^n - 1, a^m - 1) = a^{\gcd(n, m)} - 1$
Oct 25, 2015
19
How to find solutions of linear Diophantine ax + by = c?
Jun 27, 2016
13
Prove that $\gcd(a^n - 1, a^m - 1) = a^{\gcd(n, m)} - 1$
Oct 4, 2015
12
If $n^2+11$ is a prime then $n+4$ is not a cube
Jan 10, 2017
12
Make $2^8 + 2^{11} + 2^n$ a perfect square
Feb 20, 2016
11
Show that $e^{\sqrt 2}$ is irrational
Sep 18, 2015
11
Proof that $n+k+3$ divides $n(n+1)(n+2)(n+3) - k(k+1)(k+2)(k+3)$.
Oct 7, 2015
10
Find $f$ if $ f(x)+f\left(\frac{1}{1-x}\right)=x $
Nov 22, 2015
10
When is $(p-2)!-1$ power of $p$ if $p$ is prime?
Feb 19, 2016
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Difference between \mathbb and \Bbb.